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Finding the Fourth Proportional to 48,856, 73,284.06 and 11,920

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Solution

The fourth proportional to 48,856, 73,284.06 and 11,920 is: 17,880.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,856 : 73,284.06 = 11,920 : x
  2. Step 2: Convert to fraction form
    48,856/73,284.06 = 11,920/x
  3. Step 3: Cross multiply
    48,856x = 73,284.06 × 11,920
  4. Step 4: Simplify right side
    48,856x = 873,545,995.20
  5. Step 5: Solve for x
    x = 873,545,995.20/48,856
  6. Step 6: Final answer
    x = 17,880.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.